Questions tagged [concrete-block]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1 vote
1 answer
39 views

Smallest width California residential code compliant below grade R-5 cement masonry wall assembly?

I'm in California, IBC climate zone 3B, California climate zone 8, very high termite area. I'm trying to determine the smallest width (for the total wall assembly) code compliant way to insulate (to R-...
user avatar
  • 11
0 votes
0 answers
36 views

What work is needed to resolve water issues related to this settling slab?

Summary of issue This house was built around 1960 on cinderblock foundation, and in 1980 an addition was built on an apparently-DIY concrete slab foundation. Part of that concrete slab extends beyond ...
user avatar
  • 1,103
0 votes
2 answers
56 views

How to best fill wall-plug holes in a concrete wall?

My landlord took out some monitor they had originally left attached to a wall in my rental apartment, and has now left me with a nice decorative set of wall plug holes. Assume for the sake of ...
user avatar
  • 2,447
1 vote
2 answers
54 views

Bottom wall getting dirty

I have an 8 foot retaining concrete wall. I painted it a few months ago, but it seems that when the water hits the soil it jumps back up and hits the bottom wall covering it in dirt. I was wondering ...
user avatar
  • 827
2 votes
0 answers
79 views

What is the best way to run a circuit over a 3' concrete block wall (for a baseboard thermostat)?

I'm installing a Mysa wifi line voltage thermostat to control an electic baseboard heater mounted against a concrete block wall. This is in a 2nd floor detached garage, and the 2 story structure was ...
user avatar
1 vote
0 answers
55 views

Sufficient Concrete Thickness for Table?

I'm planning on making a Concrete patio table. My plan is to make a 6ft x 3ft Concrete top. The frame will be 4 legs. I will have 3 aluminum angles running vertically underneath the length of the ...
user avatar
  • 21
0 votes
0 answers
36 views

Can a partition be built with 440 x 210 x 50mm 3.6N blocks? and How?

Can a 2.5 metre to ceiling by 2 metre wide internal partition be built with 440 x 210 x 50mm 3.6N block? and How? It will be supported either side onto existing wall and above and below. How does one ...
user avatar
  • 199
0 votes
0 answers
59 views

Vinyl siding on concrete walls

I have to install vinyl siding on an exterior wall built from concrete blocks. Anyone have any tips on correctly weatherproofing and insulating? I was thinking to lay 3/4 EPS rigid insulation then 1/4 ...
user avatar
0 votes
1 answer
1k views

Florida footing depth

Could someone help me read this? Florida Building Code The structures on the left and right side will be new. Just outdoor multi purpose areas with fixed roofs. Left side for cooking (kitchenette)/ ...
user avatar
  • 2,813
1 vote
1 answer
74 views

Building a block wall up a steep slope

I would like to build a block wall up a steep slope, maybe 30%, and I don’t want to “stair step” the top, keeping it level, because it would render the wall nearly useless at the low points. If I have ...
user avatar
0 votes
1 answer
163 views

Sinking Garage Foundation Repair

My garage is attached to my home which is a single level ranch on a slab foundation. The garage has concrete blocks as footing along one wall. The garage floor is its own slab. Both the garage floor ...
user avatar
  • 293
0 votes
2 answers
234 views

How to attach this wooden beam to concrete blocks

I want to attach a wooden beam to a hollow concrete block to use as one side of a washing line. How should I do that? Are there any attachments or fixings that I should use?
user avatar
  • 245
1 vote
1 answer
102 views

Best permanent female-thread anchor in block construction?

I'm helping a friend install hurricane panels over the windows in their house. These panels are 5/8"-thick extruded clear(ish) plastic sheets, dimensionally similar to 5/8" plywood. These ...
user avatar
  • 111
4 votes
1 answer
279 views

Is this basement footer going to cause issues?

I'm having an addition put on my house with a full basement. The contractor poured the footer and is getting ready to do the foundation walls. He marked the lines for the walls, and I couldn't help ...
user avatar
  • 171
3 votes
2 answers
273 views

How to Anchor to Top of CMU Cinder Block Wall?

I want to install a fence along the top of a retaining wall. The wall is made of standard 8x8x16 CMUs and is filled with 3500psi concrete and #4 rebar in every cell. The posts have 4"x4" ...
user avatar
  • 263
-1 votes
1 answer
79 views

Does effective insulation of concreate block contribute more to energy efficiency in hot weather or cold weather [closed]

I am building a grout filled CMU house in the Ozarks. I have limited funds at this point and so I would like to focus my budget on thermal control where it will be needed most (i.e. heating / cooling)....
user avatar
0 votes
0 answers
210 views

How to get retaining blocks with a set end angle

I am trying to section off hexagonal areas in my yard. My initial thought was to get those trapezoidal blocks you can use to build retaining walls (Home Depot refers to them as Retaining Wall Blocks), ...
user avatar
  • 101
2 votes
1 answer
107 views

Resources for extreme DIY'er to build brick garage

I'm an experienced DIY'er here in the upper midwest of the United States and was planning on building my own stick built 16x24 foot detached garage this fall 2021 or spring 2022. As we all know, the ...
user avatar
  • 109
4 votes
4 answers
2k views

How to put a clean hole in concrete block?

I am building a brick wall from concrete blocks. Note that these concrete blocks just provide a facade, don't hold any weight except an additional layer of same bricks above them. The blocks are 4&...
user avatar
  • 897
2 votes
2 answers
2k views

Lateral force on posts resting on concrete deck blocks

I am building a floating deck that is not attached to the house and is 2ft in height. The 4x4 posts are inserted into and resting on top of a concrete decking block. The post is just sitting inside ...
user avatar
  • 21
0 votes
1 answer
33 views

What is N/mm² in block characteristics?

In brick/block datasheet I found strength parameter in N/mm². Does it mean how much weight can a brick hold? So, for example 10 N/mm² of 10x10cm brick could hold 100.000N ~ 10 tons? Is this correct? ...
user avatar
  • 101
2 votes
2 answers
862 views

Should the high side of a concrete block retaining wall be sealed?

I am mid-project in a DIY yard project. I have subbed out a large retaining wall to a civil / wall contractor. It’s 220 feet long, between 2-5′ in height, and makes 2 90-degree turns. It’s built to ...
user avatar
  • 263
2 votes
0 answers
130 views

Help modifying window opening. American Concrete Institute standards? Building code?

I'm remodeling my kitchen and part of the work that I want to do involves modifying my window rough openings. Currently, the windows in my kitchen are lower than the countertop backsplash and I want ...
user avatar
  • 121
1 vote
1 answer
322 views

What concrete type should I use for a pizza oven base slab?

I am building a pizza oven and kitchen area in my garden. I am trying to work out if there is a specific type of concrete I need. My question is only about the concrete slab (the foundation). The slab ...
user avatar
1 vote
1 answer
66 views

How to prepare the ground before laying concrete

I am building a pizza oven and kitchen area in my garden. I am trying to work out how to lay a 2m*2m concrete slab. My calculation for the weight (that the concrete slab needs to support) are Dense ...
user avatar
0 votes
1 answer
130 views

Building a retaining wall with dense concrete blocks, best way to lay each course?

I've seen a few walls that use the top method versus the more common stretcher/running bond, are there any benefits to doing it the first way?
user avatar
0 votes
3 answers
153 views

How to create nice corners when building a wall with these concrete blocks?

In a previous question, Why do many concrete blocks have this strange shape on either end?, I asked about the design of the concrete blocks having an I-shape at the ends. That explains how to make a ...
user avatar
  • 897
1 vote
1 answer
245 views

Why do many concrete blocks have this strange shape on either end?

I want to build a simple wall out of concrete blocks and notice some have this strange shape, the ends look like a capital letter "I". As best as I can tell from any picture, this isn't like ...
user avatar
  • 897
0 votes
1 answer
161 views

Bricking up door/damp

I'm about to block up this doorway and have noticed damp in the bottom corner. If I were to lay a DPC between the screed and first layer of blocks, would that solve the issue....or is it going to ...
user avatar
1 vote
3 answers
653 views

Is it safe to use a wedge expansion bolt in concrete blocks?

I want to hang a Rogue P-4 pull-up bar from a wall. The wall is concrete block with .5" of strapping on it, and 1" drywall over that. The pull-up bar is made with 1" steel tube. ...
user avatar
  • 111
0 votes
1 answer
54 views

How can I fill in an interior hole in a block wall?

In an attempt to run Cat6 Ethernet cables to my living room, I cut a handy box sized hole in the the block, but was unable to run the cable down from the attic at the top of the wall (it was ...
user avatar
  • 2,265
0 votes
5 answers
4k views

How to cut a concrete block without expensive tools?

I am building a wall from concrete retention wall bricks. I need to cut one brick in half so it can fit in the wall. The solutions here are too expensive, I only need to cut one brick. Is there any ...
user avatar
  • 897
0 votes
0 answers
489 views

How to glue HDPE plastic to concrete blocks?

I am using PL 500 to glue concrete bricks to each other. I need to line the back of the brick wall with some high-density polyethylene (HDPE) plastic tarps for water-proofing. The PL 500 says it will ...
user avatar
  • 897
0 votes
1 answer
57 views

Concrete block water wall footing requirements

My wife and I would like to build a 6 foot high, 8 foot long fountain wall, using concrete cinder block that will then be covered with stone veneer. My question is regarding the footing. We obviously ...
user avatar
  • 3
0 votes
1 answer
147 views

Leveling first row of CMUs on uneven slab

So I may have a couple to many beers when pouring the slab for my new outdoor fireplace, and "forgot" that I needed to pour it level and not follow the slop of the patio. Whoops... https://ibb.co/...
user avatar
  • 57
1 vote
1 answer
76 views

How to Adjust/Re-square 4' x 4' Concrete Slab

I have an approximately 4' x 4'concrete slab outside the door to my garage, like a small porch or whatever (see pic). Over the ~20 years life of the house it has moved, probably along with the dirt, ...
user avatar
  • 167
0 votes
1 answer
607 views

Filling a CMU block wall in garage

I have a CMU foundation block wall in my garage that leads to my basement (picture below). Half of the cores are empty and it is about 8-9ft deep. I regularly treat this area and the garage with ...
user avatar
  • 494
1 vote
2 answers
1k views

Concrete retaining wall with lean and crack, looking for input

We bought our 100 year old house “as-is” a year ago with various small cracks and a firm, but somewhat eroded foundation. This all needs to be addressed eventually, however, a large crack with ...
user avatar
  • 55
2 votes
2 answers
360 views

Is a concrete slab required to support a block wall?

I'm starting to plan my build of a backyard grill station / pizza oven. I plan to build a concrete block wall about 4 feet high. I'll put either concrete or stone surface on top, as well as a 1600 lb ...
user avatar
  • 123
0 votes
2 answers
1k views

1m high retaining wall build

I'm hoping to use 215mm concrete breeze blocks to build a 20m long retaining wall at 1m high. Do I need to build the blocks on their flat or can it be a regular single skin wall with piers every so ...
user avatar
1 vote
1 answer
2k views

Pouring concrete slab against 2 block walls and an asphalt driveway

I need to pour a small (~5' x ~5') concrete pad that will butt up against 2 basement block walls (A&B in the diagram) and my asphalt driveway (D in the diagram). I'm having some trouble figuring ...
user avatar
  • 217
1 vote
1 answer
70 views

Repairing finish on basement block foundation wall

I have a room in a partially finished basement which was done by the previous homeowner which is needing repair to the walls. The house is old (1925), and the foundation is concrete block. The room in ...
user avatar
0 votes
2 answers
3k views

should concrete block wall be sealed on top?

I have a 2 story + basement townhome with 8" concrete blocks walls between my neighbors. At the top of each shared wall is a sheet metal cap. Some of the cavities have concrete in them but many are ...
user avatar
  • 143
2 votes
2 answers
3k views

Can I fill cinder blocks with soil/dirt?

I have two short raised beds made of cinder blocks (8 in. and 16 in. tall) that isn't finished yet. I was wondering if it's okay to fill the voids of the blocks with excess soil from my yard? I live ...
user avatar
2 votes
2 answers
2k views

Filling hollow blocks one level at a time

I live in an area where basic building materials are available but expensive - there are not many places to rent tools and things are done slowly by hand. It is also an earthquake zone. I am thinking ...
user avatar
1 vote
2 answers
2k views

How can I remove this concrete wall anchor?

The anchor pictured was holding a hose reel, which has been removed. When I twist the part sticking out it just spins infinitely in either direction. I think it is something like a toggle or a molly ...
user avatar
  • 267
1 vote
2 answers
703 views

Floating desk on concrete block wall

I have a concrete block wall with dot and dab plasterboard. I am looking to attach a wall to wall floating desk to it. I appreciate a number of questions relating to floating desks have been asked ...
user avatar
1 vote
2 answers
356 views

Lard as release agent?

So I’m learning how to make concrete pavers with this youtube video. He mentions that he uses lard as a release agent, so he brushes that into the mold. He also suggests cooking oil or motor oil for ...
user avatar
  • 1,895
1 vote
2 answers
207 views

How do I build a fence with zero experience?

I've never built a fence or have never done any outdoor construction. I'm pretty handy and do most of my interior maintenance. I have a total of 780 feet where I need to put up a fence. I'm still ...
user avatar
0 votes
0 answers
103 views

How serious is this spalling?

Spalling is occurring on the corner of the top of the first story. I'm curious as to how serious this is.
user avatar